Quantum phase transitions in fully connected spin models: an entanglement perspective
Statistical Mechanics
2011-03-01 v2 Quantum Physics
Abstract
We consider a set of fully connected spins models that display first- or second-order transitions and for which we compute the ground-state entanglement in the thermodynamical limit. We analyze several entanglement measures (concurrence, R\'enyi entropy, and negativity), and show that, in general, discontinuous transitions lead to a jump of these quantities at the transition point. Interestingly, we also find examples where this is not the case.
Cite
@article{arxiv.1101.3654,
title = {Quantum phase transitions in fully connected spin models: an entanglement perspective},
author = {M. Filippone and S. Dusuel and J. Vidal},
journal= {arXiv preprint arXiv:1101.3654},
year = {2011}
}
Comments
9 pages, 7 figures, published version